Ok here's the deal.

I have 2 units with the same string in units name. Tank and Tank in siege mode. I have 2 triggers with 1 of the tanks in each. As I couldn't select the 2 tank from the dropdown list in Classic trigedit, I changed the second tank string(added 1at the end of string). Finished the triggers. And changed the strings back. Now I have 2 triggers with different units using the same string. I get why it shows the "something bad happened" stuff. But it doesn't go away even after I deleted the triggers. I mean there is no more conflict, why it still crashes.

Ok the "crash" is quite relative because I can still work on the map and save and everything but such functions as CtrL + U and Alt + F doesn't work anymore. Quite annoying. Now please help me to solve this.
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You should post this in the "Final Call for SCMDraft" topic pinned at the top of this forum. This sounds like a SCMDraft problem, not a general mapmaking issue.

It would get lost in the huge topic. Please help me. It's really important that I finish )) Mercury properly.

If its only a map that is crashing, send me the map so I can fix it.

Well problem solved. Big thanks to SI! Your my hero!

Any details on how/why the map crashed and how it was fixed would be a good thing to put in this thread.

It was an easy shot for SI. I had to delete the backupDB.scmdDB file. SI said it corrupts sometimes, so it cannot backup your map, and draft fails. I have a version it was just too big, as it weights exactly 2 Gigs. Maybe the string conflict caused the file to corrupt. In any way, you can always try to delete to file, I didn't knew that.